Scan module

Abstract

A scan module includes a scan motor, a laser; a sensor; and a mirror module. The mirror module includes (a) a collection mirror having an opening and (b) a fold mirror having a first end physically coupled to the collection mirror. A second end of the fold mirror is separated by a gap from the collection mirror.

1. A scan module comprising:
 a scan motor, 
 a laser; 
 a sensor; and 
 a mirror module including (a) a collection mirror having an opening and (b) a fold mirror having a first end physically coupled to the collection mirror, a second end of the fold mirror being separated by a gap from the collection mirror. 
 
   
   
     2. The scan module of  claim 1 , further comprising:
 a drive coil driving the motor in at least one direction. 
 
   
   
     3. The scan module of  claim 1 , wherein the scan motor includes:
 a spring module including (a) a static substrate and (b) a dynamic substrate comprising an extending member, the static substrate and the dynamic substrate being coupled together by a molded flexible spring; 
 a magnet coupled to a first side of the extending member; and 
 a reflective element coupled to a second side of the extending member. 
 
   
   
     4. The scan module of  claim 3 , wherein the spring module is made of the same material. 
   
   
     5. The scan module of  claim 4 , wherein the motor is molded in at least one molding step. 
   
   
     6. The scan module of  claim 3 , wherein the magnet is positioned at or near a center of rotation of the spring. 
   
   
     7. The scan module of  claim 3 , further comprising:
 a drive coil, 
 wherein a magnetic axis of the magnet is positioned approximately perpendicular to the magnetic axis of the coil. 
 
   
   
     8. The scan module of  claim 3 , wherein a volume of the scan module is less than 0.35 in 3 . 
   
   
     9. The scan module of  claim 3 , wherein a packing efficiency of the scan module is less than 5. 
   
   
     10. The scan module of  claim 3 , wherein the sensor is positioned in a chassis opposite the collection mirror and in front of the scan motor. 
   
   
     11. A method for scanning an object comprising:
 driving a scan motor; 
 directing a laser at a fold mirror of a mirror module, the mirror module including (a) a collection mirror having an opening and (b) a fold mirror having a first end physically coupled to the collection mirror, a second end of the fold mirror being separated by a gap from the collection mirror; 
 creating a scan pattern; and 
 concentrating light returning from the object to a sensor. 
 
   
   
     12. The method of  claim 11 , wherein the creating step further includes the scan motor reflecting laser light reflected by the fold mirror, the scan motor comprising:
 a spring module including a static substrate and a dynamic substrate comprising an extending member, the static substrate and the dynamic substrate being coupled together by a molded flexible spring, 
 a magnet coupled to a first side of the extending member, and 
 a reflective element coupled to a second side of the extending member. 
 
   
   
     13. The method of  claim 12 , wherein the driving step further comprises driving the scan motor in at least one direction. 
   
   
     14. The scan module of  claim 1 , wherein the second end extends from the collection mirror at the same angle as the first end.